What did you do at your previous job? Tell an interesting case.

At my previous job, I was involved in developing and maintaining an automation system for data processing for a large e-commerce project. One interesting case was related to optimizing the parsing process and handling large volumes of data from various sources.

Initially, parsing was done sequentially, which took a lot of time and caused delays in updating information. I proposed using asynchronous programming in Python with the asyncio and aiohttp libraries for parallel data downloading. This reduced processing time from several hours to a few minutes.

Here's a simplified example of asynchronous request code:

import asyncio
import aiohttp

async def fetch(url):
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            return await response.text()

async def main():
    urls = ['https://example.com/data1', 'https://example.com/data2']
    tasks = [fetch(url) for url in urls]
    results = await asyncio.gather(*tasks)
    print(results)

asyncio.run(main())

This improvement significantly increased the system's performance and stability.